The origin of quick-drying
The so-called quick-drying is actually literally translated from English QUICK-DRY or DRY-EASY and other similar words, and quick-drying means that when the fabric is compared with wool or cotton clothing, it is easier to volatilize the moisture and dry faster under the same external conditions.
Quick-drying performance
Some people think that quick-drying clothes are very mysterious, thinking that there are a lot of high-tech ingredients in them, but in fact, most of the quick-drying clothes are made of chemical fiber fabrics, but due to the difference in processing technology, it has all kinds of magical effects that ordinary clothes do not have. The water absorption is not high, the air permeability is good (varies depending on the material), there is a certain water repellency, and after being wet, it dries faster than ordinary clothes under the action of body temperature or wind.
The principle of quick-drying
From a technical point of view, the main principles of waterproof and breathable quick-drying pants are as follows:
1. Take advantage of the difference between the smallest diameter of a water droplet and the diameter of a water molecule or air molecule.
2. Adopt microporous film. The micropore size of the film is between the minimum diameter of water droplets and the maximum diameter of water molecules or air molecules, and then the film is compounded with the outer fabric to give the fabric the function of waterproof and breathable.
3. Use the hydrophilic factors and hydrophobia of different components of the inner and outer layers of the fabric to interact with each other to achieve the effect of waterproof and breathable. Due to hydrogen bonding and other intermolecular forces, water molecules adsorb water molecules on the high humidity side, and transfer them to the low humidity side through the hydrophilic base on the polymer chain to desorption to achieve the purpose of breathability.
4. Take advantage of the properties of shape memory polymers. Shape memory polymers have a qualitative mutation of air permeability due to the micro-facet movement of molecular chains. Moreover, its breathability is adjusted with the change of external temperature and humidity. The use of this shape memory polyurethane to produce waterproof and breathable fabrics can be laminated or coated in a non-porous way, which reduces the shortcomings such as the presence of micropores in the process of use due to micropores, and more importantly, the moisture permeability of the fabric can change with the change of human body temperature.
Water-repellent, waterproof, moisture-permeable, breathable, windproof
The water-repellent properties of the fabric
It refers to the special treatment of the fabric with a water repellent, and its surface can make the water droplets form a bead-shaped, which will not penetrate, diffuse and wet the clothes, so as to achieve the water splashing function like a lotus leaf (lotus effect).
Watertight
Functional treatment to prevent water infiltration, the current waterproof treatment often uses a waterproof membrane to prevent water molecules from penetrating, but the film itself is too fragile, so it is necessary to rely on the surface cloth, film, and inner lining to cooperate with each other to achieve the function of waterproofing. The waterproof ability is expressed by the water pressure resistance value, that is, the water pressure resistance value of the fabric is blocked by a fixed area of tarpaulin, and the water pressure resistance value of the fabric is when the third drop of water seeps out on the surface, usually more than 1000mm can reach the most basic waterproof ability.
Moisture permeability
Refers specifically to the function provided by the indirect breathable waterproofing membrane, not to mention the breathability, because it is two different breathable mechanisms, although both can eventually allow sweat to escape through the fabric to the outside world. Moisture permeability needs to wait for sweat to be absorbed by the hydrophilic non-porous membrane, become sweat molecules inside, and move out of the film in the form of micro-Brownian motion, affected by the humidity and pressure difference between the inside and outside of the garment
